Improvement in printing-presses



-the figures.

UNITED STATES PATENT OFFICE RICHARD M. HOE, OF NEW YORK, N. Y.

IMPROVEMENT IN PRINTING-PRESSES.

Specification forming part of LettersiPatent No. 5,188, dated July l0, 1347.

To a/ZZ wiz/0171, it may concern.-

Beit known that I, RICHARD M. HOE, of thc city, county, and State of New York, have invented new and useful Improvements in Bed and Platen Printing-Presses; and I do hereby declare that the following is a full, clear, and exact description of the principle or character which distinguishes it from all other things before known, and of the manner of making, constructing, and using the same, reference being had to theaccompanyingdrawings, making a part of this specification, in which- Figure l is an elevation of the'right-hand side of the press; Fig. 2, a plan; lFig. 3, a longitudinal vertical section taken at the line X X of Fig. 2, and Figxt a like section taken at the line Z Z of the same figure.`

The same letters indicate like parts in all The nature of the rst partot' my invention consists in operating the sliding frame that carries the inking-rollers over. the form of types bya motion independent of that which operates the frame that carries the frisket and finger-bars, so that by a simple change of the cam that gives the motions to the inkingrollers they can be passed over the form of types once or twice for each impression, once being sufficient for inferior work, and therefore admitting of a greater number of impressions than can be given when the rollers move with the frisket, and twice being re quired for good work, which does not admit of so great a number of impressions in a given time. Theseindependent motions of the inking-rollers and frisket admit of a much less range of motion than when the two move together, as it is only necessary for each to clear the platen, whereas when the two are connected and move together the frisket, after it has cleared the platen and bed, must continue to move to carry the hiking-rollers beyond the platen, and at the same time this aords more time for the rollers to receive the requisite supply of ink at the end of each motion.

The second part of my invention consists in so arranging the delivery rollers and tapes relatively to the location and motion of the frisket that part of it (the frisket) shall pass between the rollers and tapes that they mayremove the sheet therefrom and deliver it to the fly-frame or other apparatus.

The third part of my invention relates to the mode of arranging and operating thc tingers to grasp the sheet, which arrangement is as follows, viz: There are two parallel bars provided with journals at each end, placed one back of the other. To the back one are attached the upper and to the front one the lowerset of ngers,and theyare so connected by means of two pinions at each end that when one is turned the other must turn in au opposite direction, and also by means of a spring or springs, the tension of which kconstantly tends to keep the fingers closed. The rear bar turns in a frame at the rear end of the frisket, and within this frame and on the journals of this same bar is hung another frame, the ends of which project sufficiently forward to receive the journals of the forward bar, from which the lower set of fingers project. As' the ingersapproach the table from which they receive the sheet-s the ends of the forward bar enter an inclined groove on each side, which lifts the forward end of the two sets of fingers, and at the same time a crank-arm attached to the forward bar passes under a lever, which acts as an inclined plane to open the lingers to receive the edge of a fresh sheet from the table, and s0 soon as they have been carried forward suiciently the lever rises and permits the tension of the spring or springs to close thel fingers and grasp the edgc of the sheet, which is by the back motion of the frisket-frame drawn from the table onto the frisketas it is carried under the bed to receive an im pression.

The fourth part of myinvention relates to the combination and arrangement of parts for giving the requisite reciprocating intermittent motions to the frame that carries the rollers for inking the form of types, which consists of two co`g-wheels, one on each end of an arbor, the cogs of which take into the teeth of two racks, one on each side of the roller-frame, and the arbor of these two wheels has a pinion on one end that receives motion from a vibratingcogged sector that is actuated by a properly-formed cam on the main cam-shaft of the press.

The fifth part of my invention consists iu combining withthe frisket-frame an arrangement of parts substantially similar to that described as ,constituting the fourth part of through the cars of two strong bars e e, thatv v project over it to hold it down and resist the upward pressure of the platen f below. These bars e e may have nuts instead of the project-ing ears to secure the invert-ed bed, which has projections for this purpose. The bars e e are roundand pass down to the bottom of the frame to receive the bearings of the lower arm of the togglejoint levers g g, so that the whole action of the pressure given by the toggle-joint exerts no strain on the frame of the press. The toggle-joint levers are operated at the required periods by means of a cam h on the main shaft, which actsona roller 1T, that is hung in the connecting-rod j of the toggle-lever, and to resist the oblique action of the cam during part otits rotation that end ot the connecting-rod which carries the roller 'L' is jointed to anarm k, which rocks on journals at the lower part of the frame and constituting, in connection with the lower arm of the toggle, what may be called a parallel motion.7 The toggle-levers, after the impression has been given, are drawn back by a cam-groove, (represented by red lines,) into which runs a pin projecting from the connecting-rod. The form of 'this groove mustbe such relativelyto the form of the cam as to always keep the roller in contact with the surface of the cam. In these parts and the other connections for operating and steadying the motions of the platen there isV not anything claimed as essentially new, and therefore I deem it unnecessary to give a more full and minute description of them.

The form of types is -placed on the platen and is inked by the passage over them of a set of rollers Z Z Z Z, that have their bearings in a frame, the side pieces rm, m of which run in appropriate ways in the side pieces of the main frame and have rack-teeth along their lower edge that take into the cogs of a cogwhecl n on each side of the frame, the two wheels being on the same arbor o, and on one end of this arbor outside (or may be inside) the 4frame there is a pinion 19, the teeth of 'which take into the Vcogs ot a sector-rack q, that vibrates on a stud-pin qs, and thisrack has an arm fr, provided with a grooved swivel-piece 7", that embraces a cam-fillet s on the face of a platet on the shaft of the presscam,the formof which is such that starting from the point 1 for nearly two-thirds the circumference to the point 2 itis concentric and holds the inkingrollers at the back end ot the machine, where they receive a supply ot' ink from the rollers Iu u in the usual manner, and fromthe point 2 to 3 it rapidly approaches toward the center of motion to carry the rollers over the form of types to ink them,and then from the point 3 to 4 (this part is represented by dotted lines) it is concentric to hold the rollers (during the giving of the impression) over the rollers o c ofthe other inking apparatus at the other end of the press, and then from the point 4 the cam-fillet runs to-the point 1, the place of beginning, by a curve the reverse of that from 2 to 3, to carry back the hiking-rollers again over the form of types preparatory to another impression. The parts of the fillet where they cross each other are cut through to admit of the passage of the swivel-piece, which is made of sniiicient length to cover the parts cut out to prevent catching. rlhis form of cam is used for rapid printing, when it is only necessary to pass the rollers over the form once for each impression; but when it is necessary to pass them over twice for better work then a cam of the form represented at Fig. 5 is to be substituted, the fillet of which is concentric from l to 2, and from 2 to 3 it gradually approaches 'the center of motion to draw the rollers over the form, and then from 3 it runs back to 1, the place of beginning, with a reversed curve to run back the rollers. The journals of the rollers Z l ZZ run in boxes, which permit the rollers to rise and fall suliiciently to roll over the form of types by their own weight, and also to pass over the rollers uu and o c, from which they receive their supply of ink.

The sheets of paper are one by one taken from a pile and placed on an inclined'tablc w and registered by the pins that project for a short distance above the surface of the table. These register-pins pass through holes in theA table and are attached each to the end of a small spring-arm y, attached to the under side of the table, and all these arms are connected together and with an arm z of a lever a', that turns on a stud-pin b', which is forced up to draw the pins below the surface of the table preparato: y to the removal 0f the sheet by the rising of a lever c,to which is jointed a sliding rod cl', that rests on the periphery of a small cam e' on the leftliand end of the main cam-shaft and outside (or may be inside)` the frame. (Represented by dotted lines in Fig. 3.) The periphery of this cam is a concentric circleexcept for about one-fourth the circumference, where it is cut out to permit the sliding rod to descend and lift the other end of the lever, which-by its connection with the arms, to which the register-pins are attached, draws them below the surface otl the table to liberate the sheet of paper, which is taken away by the fingers connected with the frisket-fralne and carried to the form of types, which opepation is effected by the means to be next described.

The frisket f', made in the usual manner, is attached to a sliding-frame composed of two racks g g', connected together at one end by a cross-bar h', and these racks slide in grooves in the upper side pieces of the frame and outside of the racks of the inking-rollcr frame, and their cogs take into two cog-wheels t" t" on an arborj, provided with a pinion 7c', that engages and is carried by a sector-rack Z, the arm m ot' which has a piu orroller that runs in a cam-groove n', made in the face of a wheel o on the main camshaft. As this cam groove and wheel are within the plane ot the section, Fig. 3, they are represented by red lines, where it will be seen that from the point l to 2, tor. nearly one-half the circum' ference, it is concentric and holds the frisket over the form of types that the sheet of paper thereon may receive an impression. From 2 to 3 the groove runs toward the center ot' the wheel to carry the frisket toward the table and the delivery-rollers to deliver the printed sheet and receive a fresh one from the table, and at 3 the curve is reversed and runs hack to the point l, the place of beginning, to carry the frisket again over the form of types. At the back end'of the frame thatcarries the frisket 'are .attached theingers that take the sheets of paper from the table. Theyconsist of two sets, the upper p and the lower q', each attached to a separate arbor or bar r and s', parallel with and one back of the other. These two arbors are connected together by a double helical spring t', which is coiled first around one and then around the other that its tension may tend constantly to keep the fingers closed. The fin.- ger-bar 'r' has its journals in projections ru. u of the frisket-frame, so that it may turn therein, and the other inger'bar s has its journals in two short levers fu o', that are hung and turn on the elongated journals of the finger-bar r', and these two arms are connected together by a bar w to insure their moving together. The finger-bar s is provided at one end with a crank-arm for the purpose of opening the lingers, and the journals of this bar project sufficiently at each end to run into an inclined groove y jz/, placed one on each side near the table.

As the frisket-frame approaches the end of its motion toward the table the forward edge of the frisket f, with the printed sheet on it, passes between two rollers z and a, the upper one z turning in permanent boxes and carried by a belt b from a pulley c on the driving-shaft t and the lower one in boxes that slide in tubes e e and borne np by spiral springs (or in swinging arms on a shaft moved up by a cam) to make sufficient pressure to carry 0E the printed sheet from the frisket to the fly-frame f which is effected by the series of endless tapes g, that pass from the upper roller z over and `partly- 'around a roller h back of the roller a, around another roller i, and then back to the first. The roller 5', which is in fact only a shaft, has wheels j on it, which may be shifted to suit the frisket and around which the endless conveying tapes pass, and which are guided and retained thereon by iianged guide-rollers k, one for cach wheel or tape. They turn on stud-pins ou the ends ofarms l", projecting from an arbor m.

The y-framef, which receives the printed sheets from the delivery-rollers, vibrates ou journals at the lower edge, one of which has an arm n jointed to a spring o, the tension ot' which keeps it in a horizontal position or lying on the pile of sheets which it has delivered, and it is elevated to a vertical -or inclined position at each operation to receive a printed sheet from the delivery-rollers by a cam p on the end of the main camshaft, which cam acts on a sliding rod q, jointed to an arm fr on one of the journals.

As the frisket is moved forward to deliver the printed sheet the projecting journals of the finger-bar s enter and run up the iuclined grooves y y', which elevates the fingers toward the edge of the sheet on the table, and at the same time the wrist of the crankarm of this bar runs under the lever a', which turns the bar and opens the under lingers, which motion at the same time throws up the upper fingers, as the two finger bars are geared together by two small piuions s s. While these fingers are opening they are moving forward toward the edge of the sheet to be gripped, the printed sheet having been drawn out by the delivery-rollers, and so soon as the frisket-frame has completed its motion the lever c rises, which permits the tension ot' the. spring or springs to close the fingers to grip the edge of the sheet and at the same time forces down the registerpins, so that the sheet can be drawn from the table and dropped onto the frisket and carried over the form to receive the impression.

Motion is communicated from the driving- Shaft to the main cam-shaft by a pinion t. on the former taking into the cogs of a wheel u" onA the latter, and the two inking apparatus are driven by bands o" and fw from pulleys as y.

The weight of the platen and form is bali anced in the usual manner by rods a" z, ex-

tending down to spring-arms.

The plates of the cams for operating the inking-roller frame are made in two parts, as represented in Fig. 5, and secured to the wheel u on the main cam-shaft by means of screws, so that one can be removed and the other substituted with facility'.

What I' claim as my invention, and desire to secure by Letters Patent, is-

1. Giving to the inking-rollerframe for inking the form of types its motions independent of the motions of the frisket-frame, substantially as described, whereby the range of motion to be given to them can be reduced, more time can be given to the rollers to receive their supply of ink, and the rollers can be carried over the form of types once, twice,

4or'inore times for each impression, as described.

2. The method of removing the printed sheet from the frisket by passing a part of the frisket between rollers that remove the sheet and deliver' it t0 the ily-frame or other apparatus for delivering the printed sheets, substantially as described.

3. The arrangement of the finger-bars in combination with the inclined planes into which the ends of the forward bar pass, and the lever which acts as an inclined plane to open the fingers, and then risesto suffer the tension `of the spring to close them, substantially as described.

4c. The arrangement of either of the cams that operate the inking-roller frame, the cogged sector, land the train of Wheels, in

combination with the inking-roller frame, substantially as described, whereby 'I am enabled to attain the' required intermittent reciprocating motions more efficiently than by any other means known to me.

5` The arrangement of the cam, the sector, and train of wheels, as described, in combination with the frisket and finger frame, in

the manner and for the pn rpose substantially as described.

RIOHD. M. HOE. \'\'itnesses:

THos. SHEPHERD, HENRY LUDWIG. 

